Chawner, H;
Marsh, K;
Matsuura, M;
Gomez, H;
Cigan, P;
De Looze, I;
Barlow, M;
... Rho, J; + view all
(2019)
A catalogue of Galactic supernova remnants in the far-infrared: revealing ejecta dust in pulsar wind nebulae.
Monthly Notices of the Royal Astronomical Society
, 483
(1)
pp. 70-118.
10.1093/mnras/sty2942.
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Abstract
We search for far-infrared counterparts of known supernova remnants (SNRs) in the Galactic plane (10° < |l| < 60°) at 70–500 μm using the Herschel Infrared Galactic Plane Survey (Hi-GAL). Of 71 sources studied, we find that 29 (41 per cent) SNRs have a clear FIR detection of dust emission associated with the SNR. Dust from 8 of these is in the central region, and 4 indicate pulsar wind nebulae (PWNe) heated ejecta dust. A further 23 have dust emission in the outer shell structures which is potentially related to swept-up material. Many Galactic SNe have dust signatures but we are biased towards detecting ejecta dust in young remnants and those with a heating source (shock or PWN). We estimate the dust temperature and mass contained within three PWNe, G11.2–0.3, G21.5–0.9, and G29.7–0.3, using modified blackbody fits. To more rigorously analyse the dust properties at various temperatures and dust emissivity index β, we use point process mapping (PPMAP). We find significant quantities of cool dust (at 20–40 K) with dust masses of Md = 0.34 ± 0.14 M⊙, Md = 0.29 ± 0.08 M⊙, and Md = 0.51 ± 0.13 M⊙ for G11.2–0.3, G21.5–0.9, and G29.7–0.3, respectively. We derive the dust emissivity index for the PWN ejecta dust in G21.5–0.3 to be β=1.4±0.5 compared to dust in the surrounding medium where β=1.8±0.1.
| Type: | Article |
|---|---|
| Title: | A catalogue of Galactic supernova remnants in the far-infrared: revealing ejecta dust in pulsar wind nebulae |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/sty2942 |
| Publisher version: | https://doi.org/10.1093/mnras/sty2942 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | stars, ISM: supernova remnants, infrared: ISM, submillimetre: ISM |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10066835 |
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